# A149291 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 46
5 145
6 641
7 2275
8 10330
9 38683
10 179077
11 698969
12 3277788
13 13154295
14 62279600
15 255360623
16 1217775810
17 5076594445
18 24346635475
19 102858261727
20 495528611722
21 2116511750627
22 10234179952692
23 44114208093693
24 213964420670390
25 929479716561285
26 4519843635303271
27 19766146842430959